I made some experiments during the night.
Two programs unattended plus one attended
1) start 2 hours before sunrise, no climatic correction, unknown water level. Executed and logged
2) start 1 hours before sunrise, climatic correction, unknown water level. Not executed (no water on the dry soil this morning) and not logged
3) start 3 hours after sunrise, climatic correction, 133 % water level. Executed with correction and logged
I presume that during the night the water level drops to zero and this inhibit the execution of the programs.